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Mutant Bacteria: Nature Outwits Us at Every Turn

Updated June 15, 2007 12:01 a.m. ET

How ironic, the triumph of nature! Robert Lee Hotz's "Science Journal" column ("Evolution at Work: Watching Bacteria Grow Drug Resistant," Marketplace, June 8) points out how nature outwits the best efforts of humans.

As a pediatric cardiologist, with 30 years' experience, I have always felt that my efforts fly in the face of natural selection, as defined by Charles Darwin. With modern drugs, surgery and catheter-based techniques we save infants and children with complex congenital cardiovascular abnormalities...